Selectfluor Mediated Direct C–H Fluorination of 3-Heteroaryl-Oxindoles

An efficient transition-metal-free fluorination synthesis of N -H-free 3-heteroaryl-oxindoles with Selectfluor was depicted. Under mild reaction conditions, a series of 3-heteroaryl-fluorooxindoles were produced in yield of 62–88% using Selectfluor as a fluorine source.